"Best" ibook g4 power adapter?`

My MacAlly power adapter crapped out for no good reason today. The connector from the brick to my computer is not working. When it's plugged in the blue led light is off. When I unplug it from the brick, the blue led light goes back on. I don't care to fiddle with it, so I'm looking for a new power adapter. I've looked at the new MacAlly's adapter, the one from powermedic, the macwizard one, and a couple others on ebay and the like.

My question is, which one do you all use? Is it worth it to just go and buy the Apple power adapter? I want to spend my money knowing I'm buying a legitimate product. It seems as though I haven't had my MacAlly power adapter for that long, either, maybe 6-8 months tops. I am a college student, so money is scarce

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